(2x^2-3x-4)+(3x^2+4x-1)=0

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Solution for (2x^2-3x-4)+(3x^2+4x-1)=0 equation:


Simplifying
(2x2 + -3x + -4) + (3x2 + 4x + -1) = 0

Reorder the terms:
(-4 + -3x + 2x2) + (3x2 + 4x + -1) = 0

Remove parenthesis around (-4 + -3x + 2x2)
-4 + -3x + 2x2 + (3x2 + 4x + -1) = 0

Reorder the terms:
-4 + -3x + 2x2 + (-1 + 4x + 3x2) = 0

Remove parenthesis around (-1 + 4x + 3x2)
-4 + -3x + 2x2 + -1 + 4x + 3x2 = 0

Reorder the terms:
-4 + -1 + -3x + 4x + 2x2 + 3x2 = 0

Combine like terms: -4 + -1 = -5
-5 + -3x + 4x + 2x2 + 3x2 = 0

Combine like terms: -3x + 4x = 1x
-5 + 1x + 2x2 + 3x2 = 0

Combine like terms: 2x2 + 3x2 = 5x2
-5 + 1x + 5x2 = 0

Solving
-5 + 1x + 5x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
5 the coefficient of the squared term: 

Divide each side by '5'.
-1 + 0.2x + x2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + 0.2x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + 0.2x + x2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 0.2x + x2 = 0 + 1
0.2x + x2 = 0 + 1

Combine like terms: 0 + 1 = 1
0.2x + x2 = 1

The x term is 0.2x.  Take half its coefficient (0.1).
Square it (0.01) and add it to both sides.

Add '0.01' to each side of the equation.
0.2x + 0.01 + x2 = 1 + 0.01

Reorder the terms:
0.01 + 0.2x + x2 = 1 + 0.01

Combine like terms: 1 + 0.01 = 1.01
0.01 + 0.2x + x2 = 1.01

Factor a perfect square on the left side:
(x + 0.1)(x + 0.1) = 1.01

Calculate the square root of the right side: 1.004987562

Break this problem into two subproblems by setting 
(x + 0.1) equal to 1.004987562 and -1.004987562.

Subproblem 1

x + 0.1 = 1.004987562 Simplifying x + 0.1 = 1.004987562 Reorder the terms: 0.1 + x = 1.004987562 Solving 0.1 + x = 1.004987562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1' to each side of the equation. 0.1 + -0.1 + x = 1.004987562 + -0.1 Combine like terms: 0.1 + -0.1 = 0.0 0.0 + x = 1.004987562 + -0.1 x = 1.004987562 + -0.1 Combine like terms: 1.004987562 + -0.1 = 0.904987562 x = 0.904987562 Simplifying x = 0.904987562

Subproblem 2

x + 0.1 = -1.004987562 Simplifying x + 0.1 = -1.004987562 Reorder the terms: 0.1 + x = -1.004987562 Solving 0.1 + x = -1.004987562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1' to each side of the equation. 0.1 + -0.1 + x = -1.004987562 + -0.1 Combine like terms: 0.1 + -0.1 = 0.0 0.0 + x = -1.004987562 + -0.1 x = -1.004987562 + -0.1 Combine like terms: -1.004987562 + -0.1 = -1.104987562 x = -1.104987562 Simplifying x = -1.104987562

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.904987562, -1.104987562}

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